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133 lines
2.9 KiB
PHP
133 lines
2.9 KiB
PHP
--TEST--
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foreach with Iterator.
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--FILE--
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<?php
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class MealIterator implements Iterator {
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private $pos=0;
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private $myContent=array("breakfast", "lunch", "dinner");
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public function valid(): bool {
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global $indent;
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echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
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return $this->pos<3;
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}
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public function next(): void {
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global $indent;
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echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
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$this->myContent[$this->pos++];
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}
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public function rewind(): void {
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global $indent;
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echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
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$this->pos=0;
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}
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public function current(): mixed {
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global $indent;
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echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
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return $this->myContent[$this->pos];
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}
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public function key(): mixed {
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global $indent;
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echo "$indent--> " . __METHOD__ . " ($this->pos)\n";
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return "meal " . $this->pos;
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}
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}
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$f = new MealIterator;
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var_dump($f);
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echo "-----( Simple iteration: )-----\n";
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foreach ($f as $k=>$v) {
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echo "$k => $v\n";
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}
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$f->rewind();
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$indent = " ";
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echo "\n\n\n-----( Nested iteration: )-----\n";
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$count=1;
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foreach ($f as $k=>$v) {
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echo "\nTop level " . $count++ . ": \n";
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echo "$k => $v\n";
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$indent = " ";
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foreach ($f as $k=>$v) {
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echo " $k => $v\n";
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}
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$indent = " ";
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}
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?>
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--EXPECTF--
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object(MealIterator)#%d (2) {
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["pos":"MealIterator":private]=>
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int(0)
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["myContent":"MealIterator":private]=>
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array(3) {
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[0]=>
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string(9) "breakfast"
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[1]=>
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string(5) "lunch"
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[2]=>
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string(6) "dinner"
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}
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}
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-----( Simple iteration: )-----
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--> MealIterator::rewind (0)
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--> MealIterator::valid (0)
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--> MealIterator::current (0)
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--> MealIterator::key (0)
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meal 0 => breakfast
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--> MealIterator::next (0)
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--> MealIterator::valid (1)
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--> MealIterator::current (1)
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--> MealIterator::key (1)
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meal 1 => lunch
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--> MealIterator::next (1)
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--> MealIterator::valid (2)
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--> MealIterator::current (2)
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--> MealIterator::key (2)
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meal 2 => dinner
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--> MealIterator::next (2)
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--> MealIterator::valid (3)
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--> MealIterator::rewind (3)
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-----( Nested iteration: )-----
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--> MealIterator::rewind (0)
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--> MealIterator::valid (0)
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--> MealIterator::current (0)
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--> MealIterator::key (0)
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Top level 1:
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meal 0 => breakfast
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--> MealIterator::rewind (0)
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--> MealIterator::valid (0)
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--> MealIterator::current (0)
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--> MealIterator::key (0)
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meal 0 => breakfast
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--> MealIterator::next (0)
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--> MealIterator::valid (1)
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--> MealIterator::current (1)
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--> MealIterator::key (1)
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meal 1 => lunch
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--> MealIterator::next (1)
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--> MealIterator::valid (2)
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--> MealIterator::current (2)
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--> MealIterator::key (2)
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meal 2 => dinner
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--> MealIterator::next (2)
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--> MealIterator::valid (3)
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--> MealIterator::next (3)
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Warning: Undefined array key 3 in %s on line %d
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--> MealIterator::valid (4)
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